In 1987, Chad “Pimp C” Butler formed UGK (Underground Kingz) and soon recruited Bernard “Bun B” Freeman. The duo signed with Jive Records and released several albums beginning in 1992 with Too Hard to Swallow. In 1994 they released their second album, Super Tight, which included the hit track “It’s Supposed to Bubble” and was listed on the Billboard Hot 200. They were later featured on the hit singles “Big Pimpin’” by Jay-Z and “Sippin’ on Some Syrup” by Three 6 Mafia.

In December 2007, Pimp C passed away from an accidental medication overdose in his West Hollywood hotel just days after performing with Too Short at the House of Blues in Los Angeles. Bun B is working on finalizing the last UGK album which the duo was in the process of recording when Pimp C passed away.